CN109357719A - The detonator dose of view-based access control model, line footpath, the online test method for defect of intaking - Google Patents
The detonator dose of view-based access control model, line footpath, the online test method for defect of intaking Download PDFInfo
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- CN109357719A CN109357719A CN201811535125.9A CN201811535125A CN109357719A CN 109357719 A CN109357719 A CN 109357719A CN 201811535125 A CN201811535125 A CN 201811535125A CN 109357719 A CN109357719 A CN 109357719A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
- G01N21/95607—Inspecting patterns on the surface of objects using a comparative method
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Abstract
The present invention discloses a kind of detonator dose of view-based access control model, line footpath, the online test method for defect of intaking, and irradiates detonator to be detected from different directions using several light sources, and acquire the image that several light sources irradiate detonator to be detected using a visual imaging device.Judge dose value: extracting the gray value of detonator in image, be inserted according to the gray value of extraction into the gray scale constructed in advance-dose coordinate system, to obtain the dose value of the detonator of current detection.Judge line footpath value: obtaining the upper and lower boundary profile of detonator in image, be inferred to upper and lower boundary straight line, by calculating the distance between upper and lower boundary straight line, obtains the outer diameter of detonator.Judgement water inlet defect or Charge distribution are uneven: the position of detonator in positioning image, and detonator in image and image template are carried out to the comparison of Pixel-level, compare the gray scale difference of the two respective pixel, mark bad pixel, merge adjacent bad pixel, it obtains defective region, is determined according to defective region area.
Description
Technical field
The present invention relates to automatic measurement technique field more particularly to a kind of detonator dose of view-based access control model, line footpath, water inlets
The online test method of defect.
Background technique
Detonator is hollow circular-tube, generally transparent or translucent plastic material, its inner wall be attached with one layer lead it is quick-fried
Medicine.
Currently, in detonator production, detonator can not stopped to pull out by pulling equipment, automatic to put in poison while pulling out
Primer is added to inside detonator by mechanism.Since medicinal powder particle is uneven, along with automatic medicine discharging mechanism work is unreliable,
It will cause the uneven of detonator Chinese medicine dose, need to reject non-uniform detonator.Furthermore, it is necessary to control detonator
Line footpath, it is excessively thick or meticulous can not be used, it is also desirable to reject.
Rejecting for defective products, traditional method are rejected using manual identified, and great work intensity cannot accomplish full inspection,
It can only inspect by random samples, low efficiency, subjective factor is big, unreliable.
Also there is vision inspection apparatus appearance in recent years, structure is that detonator is placed between backlight and camera, then
Do not stop detection of taking pictures, the difference of dose is judged by comparison pixel grey scale difference.The defect of this device is can only to detect to lead
One face of booster, does not account for the phenomenon that primer is unevenly distributed in detonator, to cause the unqualified mistake of dose
Sentence rate height, also not accounting for detonator outer diameter not is round but ellipse feature, causes the line footpath inaccuracy of measurement
Problem.
Therefore, the prior art is defective, needs to improve.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of detonator dose of view-based access control model, line footpath, into
The online test method of water defect.
In order to achieve the above object, the present invention is achieved by the following technical programs: the present invention provides a kind of view-based access control model
Detonator dose, line footpath, intake defect online test method, using several light sources irradiate from different directions it is to be detected lead it is quick-fried
Pipe, and the image that several light sources irradiate detonator to be detected is acquired using a visual imaging device；
Judge dose value: extracting the gray value of detonator in image, is inserted according to the gray value of extraction to constructing in advance
In gray scale-dose coordinate system, to obtain the dose value of the detonator of current detection；
Judge line footpath value: the upper and lower boundary profile for obtaining detonator in image is passed through with being inferred to upper and lower boundary straight line
The distance between upper and lower boundary straight line is calculated, the outer diameter of detonator is obtained；
Judgement water inlet defect or Charge distribution are uneven: the position of detonator in positioning image, and by detonator in image
The comparison that Pixel-level is carried out with image template, both compares the gray scale difference of respective pixel, in the image of the detonator of tag image
Gray scale difference is greater than the bad pixel of preset value, merges adjacent bad pixel later, obtains defective region, according to the defective region
Area determines whether that bad into water or Charge distribution is uneven.
The light source includes the first backlight and the second backlight, the light-emitting surface and the second backlight of first backlight
Light-emitting surface it is perpendicular, the visual imaging device be set to first backlight light-emitting surface on, second backlight
Light-emitting surface is equipped with reflex reflector lens, and the angle of the reflex reflector lens and the light-emitting surface of second backlight is 45 degree.
First backlight, the second backlight and reflex reflector lens surround a test space, and the detonator to be detected is set
In in the test space.
When judging dose value, vision positioning first is carried out to detonator in image, determines the actual bit of detonator in the picture
It sets, extracts the gray value of detonator centre line zone in image.
When judging dose value, the gray value of two images of detonator, obtains average gray value, root at least in acquisition image
The dose value of the detonator of current detection is obtained according to the average gray value.
The building of the gray scale-dose coordinate system is using gray scale as X-axis, using dose as Y-axis, by the qualification of low dose
The dose value of detonator and gray value, which are input in coordinate system, to be determined a bit, then by the dose value of the qualified detonator of high dose with
Gray value, which is input in coordinate system, determines another point, connects this two o'clock and removes top straight line, subsequent according to the straight line and measuring
The gray value arrived can calculate the dose value of detonator to be detected.
When judging line footpath value, after obtaining upper and lower boundary profile, straight line fitting is carried out to boundary profile, obtains upper and lower boundary
Straight line.
When judging line footpath value, the outer diameter of two images of detonator, averages, later as most at least in calculating image
Terminate fruit.
When judging line footpath value, each image of detonator is divided into multistage in image, one outer diameter of each section of measurement, later
Average value is calculated, using the average value as the outer diameter of the image.
The image that the detonator that it is qualified that described image template is acquisition obtains.
Using the above scheme, the present invention provides the online inspection of the detonator dose, line footpath, defect of intaking of a kind of view-based access control model
The first backlight and the second backlight and reflecting optics is arranged in detonator side in survey method, and vision imager is arranged in the other side
Part takes pictures in real time to detonator, then by being split to detonator image, positions, gray scale is extracted, calibration, geometry
Measurement is learned, particle analysis and smoothing filtering operation realize to obtain the dose of detonator, line footpath and defect situation
To dose, the automatic detection of line footpath and defect in detonator production process.
Detailed description of the invention
Fig. 1 is the position view of light source, reflecting optics and visual imaging device in the present invention.
Fig. 2 is the schematic diagram of the image of an embodiment in the present invention.
Fig. 3 is gray scale-dose coordinate system schematic diagram in the present invention.
Fig. 4 is that some image of detonator is divided into 8 sections of schematic diagrames measured in the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The present invention provides a kind of detonator dose of view-based access control model, line footpath, the online test method for defect of intaking, automatic to survey
Measure detonator inner wall primer dose, the outer diameter of detonator whether meet the requirements and detonator pipe in whether there is or not flooded conditions.
Firstly, irradiating detonator to be detected from different directions using several light sources, and acquired using a visual imaging device
Several light sources irradiate the image of detonator to be detected, are judged later according to acquired image above-mentioned three kinds of situations.?
In the present embodiment, the light source includes the first backlight and the second backlight, as shown in Figure 1, first backlight 2 goes out light
Face and the light-emitting surface of the second backlight 3 are perpendicular, and the visual imaging device 5 is set on the light-emitting surface of first backlight 2,
The light-emitting surface of second backlight 3 is equipped with reflex reflector lens 4, the light-emitting surface of the reflex reflector lens 4 and second backlight 3
Angle be 45 degree, visual imaging device 5 receives the first backlight 2 issues and light that reflecting optics 4 reflect back, image
It include two images 6 and 7 of detonator 1 in 10, as shown in Figure 2.Two images 6 and 7 are to observe from horizontal direction respectively
Detonator 1 and the detonator 1 observed from vertical direction.First backlight 2, the second backlight 3 and reflex reflector lens 4 enclose
At a test space, the detonator 1 to be detected is set in the test space.Below and with light source be the first backlight with
Second backlight is described.
The visual imaging device 5 is industrial camera.
Judge dose value principle: the primer of detonator inner wall is usually the opaque powder of grey black, when in detonator
When dose is big, detonator seems to black；When dose is small in detonator, detonator seems that color is shallower, leads
Booster shade and the approximately linear relationship of dose size, therefore can be judged by extracting the gray value of detonator image
The dose size of detonator.
In the real-time pulling process of detonator, exists when detonator high-speed motion and move up and down, cause detonator center line
Position can move up and down, and in order to overcome this bounce, first carry out vision positioning to detonator in image, determine that detonator exists
Physical location in image extracts the gray value of detonator centre line zone in image.It is inserted according to the gray value of extraction to pre-
In the gray scale first constructed-dose coordinate system, to obtain the dose value of the detonator of current detection.The present invention uses the mode of being based on
Identification method determines detonator position, first sets the center 11 of detonator, as shown in Fig. 2, the template image of detonator is then done,
After taking pictures, the position of detonator is identified by template image matching algorithm.
Further, dose is deposited in detonator lower part in order to prevent, when judging dose value, is at least led in acquisition image quick-fried
The gray value of two images of pipe, obtains average gray value, and the medicine of the detonator of current detection is obtained according to the average gray value
Magnitude.Specifically, as shown in Fig. 2, (central area is for the gray values of central area pixel of two images 6 and 7 in acquisition image
Between 12 and 13), it is averaged after calculating, obtains average gray value as final gray value.
In order to establish connection between the sum of the grayscale values dose by detonator central area, need to carry out just gray scale and dose
Beginningization calibration, scaling method is the qualified detonator for being respectively produced low dose and high dose, and respective dose value is surveyed in advance
It sets.As shown in figure 3, building gray scale-dose coordinate system is using gray scale as X-axis, using dose as Y-axis, by low dose (prescribe medicine
Amount calibration) qualified detonator dose value (8.4mg) and gray value (121) be input in coordinate system and determine a bit, then will be high
The dose value (12.3mg) of the qualified detonator of dose (high dose calibration) and gray value (103) are input in coordinate system and determine separately
A bit, it connects this two o'clock and determines that straight line, the subsequent gray value obtained according to the straight line and measurement can calculate to be detected
The dose value of detonator.
Judge the principle of line footpath value: using Edge-Detection Algorithm, obtaining the upper and lower boundary wheel of detonator in image
Exterior feature carries out straight line fitting to boundary profile, obtains upper and lower boundary straight line, by calculating the distance between upper and lower boundary straight line, obtains
Obtain the outer diameter of detonator.In order to be promoted, the outer diameter of two images of detonator, averages later, makees at least in calculating image
For final result.It is measured from multiple angles, can not be thus that round but ellipse causes sometimes to avoid detonator
The inaccurate problem of linear diameter measurement.
The outer diameter measured at this time is indicated with pixel value, in order to obtain actual physical size, is needed big to pixel
It is small to be demarcated, scaling method are as follows: it is straight as unit of pixel value to measure it for circular object known to one physical diameter of insertion
Diameter to obtain the relationship between physical size and pixel size, and then extrapolates the outer diameter of detonator.
In order to further enhance the accuracy of measurement, when judging line footpath value, each image of detonator in image is divided
For multistage, one outer diameter of each section of measurement calculates average value, using the average value as the outer diameter of the image later.Such as Fig. 4 institute
Show, some image of the detonator in Fig. 2 be divided into 8 sections, respectively determine 8 sections upper and lower boundary straight line (8a1 to 8a8,
8b1 to 8b8) is measured, and is finally averaged.
Judge water inlet defect or the non-uniform principle of Charge distribution: when intaking occurs in detonator or Charge distribution is uneven
When, the gray scale of detonator can change.Firstly, the above-mentioned pattern matching mode of use positions the upper and lower of detonator in the picture
Compare the two respective pixel after the completion of positioning, and by the comparison of detonator in image and image template progress Pixel-level in position
Gray scale difference, gray scale difference is greater than the bad pixel of preset value in the image of the detonator of tag image, completes the comparison of all pixels
A width result images are formed later, and closing operation operation is carried out to result images, merges adjacent bad pixel, then to knot
Fruit image does particle analysis, and the size of particle has just reacted the area of current detonator defective region, according to the defective region face
Product determines whether that bad into water or Charge distribution is uneven.Specifically when this defective region area is greater than a setting value
When, it is undesirable for being considered as this section of detonator.Setting value can be set according to real data.Described image template is that acquisition is qualified
The obtained image of detonator.
When carrying out Pixel-level comparison, gray scale caused by the graininess in order to overcome detonator inner wall medicinal powder point
Cloth nuance devises a comparison range, as long as current pixel point gray scale is all with pixel corresponding on image template
Within the set range, be considered as current pixel point is OK to the error for enclosing the pixel gray value in the rectangular area of setting,
Remaining situation is just determined as that current pixel point is NG.
In conclusion the present invention provides the on-line checking side of a kind of detonator dose of view-based access control model, line footpath, defect of intaking
The first backlight and the second backlight and reflecting optics is arranged in detonator side in method, and visual imaging device is arranged in the other side, right
Detonator is taken pictures in real time, then by being split to detonator image, is positioned, gray scale is extracted, and calibration, geometry is surveyed
Amount, particle analysis and smoothing filtering operation, to obtain the dose of detonator, line footpath and defect situation, realize lead it is quick-fried
To dose, the automatic detection of line footpath and defect in pipe production process.
The above is merely preferred embodiments of the present invention, be not intended to restrict the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (10)
1. the online test method of a kind of detonator dose of view-based access control model, line footpath, defect of intaking, which is characterized in that if using
Dry light source irradiates detonator to be detected from different directions, and acquires several light sources using a visual imaging device and irradiate to be detected lead
The image of booster；
Judge dose value: extracting the gray value of detonator in image, be inserted according to the gray value of extraction to the gray scale-constructed in advance
In dose coordinate system, to obtain the dose value of the detonator of current detection；
Judge line footpath value: the upper and lower boundary profile for obtaining detonator in image passes through calculating to be inferred to upper and lower boundary straight line
Distance between upper and lower boundary straight line, obtains the outer diameter of detonator；
Judgement water inlet defect or Charge distribution are uneven: the position of detonator in positioning image, and by detonator in image and scheme
As the comparison of template progress Pixel-level, compare the gray scale difference of the two respective pixel, gray scale in the image of the detonator of tag image
Difference is greater than the bad pixel of preset value, merges adjacent bad pixel later, obtains defective region, according to the defective region area
Determine whether that bad into water or Charge distribution is uneven.
2. the online test method of the detonator dose of view-based access control model according to claim 1, line footpath, defect of intaking,
It is characterized in that, the light source includes the first backlight and the second backlight, the light-emitting surface and the second backlight of first backlight
The light-emitting surface in source is perpendicular, and the visual imaging device is set on the light-emitting surface of first backlight, second backlight
Light-emitting surface be equipped with reflex reflector lens, the angle of the light-emitting surface of the reflex reflector lens and second backlight is 45 degree.
3. the online test method of the detonator dose of view-based access control model according to claim 2, line footpath, defect of intaking,
It is characterized in that, first backlight, the second backlight and reflex reflector lens surround a test space, and the detonator to be detected is set
In in the test space.
4. the online test method of the detonator dose of view-based access control model according to claim 1, line footpath, defect of intaking,
It is characterized in that, when judging dose value, vision positioning first is carried out to detonator in image, determines the actual bit of detonator in the picture
It sets, extracts the gray value of detonator centre line zone in image.
5. the online test method of the detonator dose of view-based access control model according to claim 1, line footpath, defect of intaking,
It being characterized in that, when judging dose value, the gray value of two images of detonator, obtains average gray value at least in acquisition image,
The dose value of the detonator of current detection is obtained according to the average gray value.
6. the online test method of the detonator dose of view-based access control model according to claim 1, line footpath, defect of intaking,
It is characterized in that, the building of the gray scale-dose coordinate system is using gray scale as X-axis, using dose as Y-axis, by the conjunction of low dose
The dose value of lattice detonator and gray value, which are input in coordinate system, to be determined a bit, then by the dose value of the qualified detonator of high dose
It is input in coordinate system with gray value and determines another point, connected this two o'clock and remove top straight line, it is subsequent according to the straight line and measurement
Obtained gray value can calculate the dose value of detonator to be detected.
7. the online test method of the detonator dose of view-based access control model according to claim 1, line footpath, defect of intaking,
It is characterized in that, when judging line footpath value, after obtaining upper and lower boundary profile, straight line fitting is carried out to boundary profile, obtains upper and lower side
Boundary's straight line.
8. the online test method of the detonator dose of view-based access control model according to claim 7, line footpath, defect of intaking,
It being characterized in that, when judging line footpath value, the outer diameter of two images of detonator, averages later at least in calculating image, as
Final result.
9. the online test method of the detonator dose of view-based access control model according to claim 7 or 8, line footpath, defect of intaking,
It is characterized in that, when judging line footpath value, each image of detonator is divided into multistage in image, one outer diameter of each section of measurement,
Average value is calculated later, using the average value as the outer diameter of the image.
10. the online test method of the detonator dose of view-based access control model according to claim 1, line footpath, defect of intaking,
It is characterized in that, the image that the detonator that it is qualified that described image template is acquisition obtains.
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Application publication date: 20190219 |